Mold for linotype-machines.



No. 637,|l7. I Patented Nov. I4, |899.

I C. HLLIWELL &. W. J.ILEWIS.

MULD FOB LINOTYFE MACHINES.

(Application led Feb. 18, 1899.)

' 3 Sheets-Sheet @any No. 637,117. Patented Nov. 14, |899. c.'H0|.L|wELL & w.-.|. LEwls.

MOLD FDR LINOTYPE MACHINES.

(Application led Feb. 1B, 1899.)

(No Model.)

gfx/M @Wg/@Q Patented Nov. i4, |899. C. HOLLIWELL & W. J. LEWIS.

MOLD F03 LINOTYPE MAGHINES.

[Application filed Feb. 18, 1899.)

3 Sheets-Sheet 3,

. (No Model.)

UNITED STA-.ES

PATENT Orifice.,y

CHARLES I-IOLLIWELL AND WARWICK J. LEWIS, OF BROADHEATII, ENG- LAND, ASSIGN ORS TO THE MERGENTH'ALER LINOTYPE COMPANY,'OF

NEW YORK, N. Y.

MOLD Foa LiNoTYPE-MACHINES.

SPECIFICATION forming part of Letters Patent No. 637,117, dated November 14, 1899;

Application led February 18, 1899. Serial No. 706,035. (No model.)

T0 @ZZ whom it may concern; y

Be it known that we, CHARLES HoLLIWELn and WARWICK J. LEWIS, of Broadheath, in the county of Chester, England, have invented certain new and useful Improvements in Mechanism for Corin g the Molds of Linotype- Machines; and we do hereby declare the following to be a full, clear, and exact description of the invention, such as Will enable others skilled in the art to which it appertains to make and use the same.

The present invention consists in improveity for the body of the linotype, the cavity extending through the block from the front to the rear of it, the linotype being without notches or indentations and of such form that it may be pushed directly out of the mold without separatingT or opening the latter. The said block is carried by a gear-wheel commonly known as the mold-wheel, and to which it is xed with its cavity standing parallel with a diameter of it and in a hole in it, so that the said block extends through the Wheel. The Wheel is turned about its axis through a certain arc and moved forward to hold the mold-cavity in the casting position between the composed line of matrices and space-bars in front of it and the metal-pot mouthpiece behind it, whereupon the linotype is cast. The metal-pot and mold-wheel are then moved back, and the mold-wheel is turned again to hold the said cavity with the linotype in it` between the ejector and the galley and moved forward again, whereupon theA blade of theej'ector is advanced through thesaid cavity andpushes the said linotype outinto the galley.

[In the molds above referred to, the partsA of which were inseparably united when in use, it was impossible to cast linotypes of irregular forms-*that is to say, with notches or indentations therein-as is sometimes required in order to hold them in special printing-presses orto cast them of less than the full type height.

The object of the present invention is/to construct an automatically-acting mold the parts of which are separated after the casting action and so formed as to permit the ejection of linotypes having notches or cavities in their ends, their bases, or both.

According to the invention described in the first-mentioned patent, the coring ofthe moldcavity is edected by passing a core or cores down into it through the cap-plate just before the linotype is cast and withdrawing 'them soon enough to clear the advancing ejector-blade. There is, however, one imperfection in that invention, and it is that the width of the core or cores (transversely of the mold-cavity, that is) may be and sometimes is sufficient to weaken the cap-plate, thereby depriving it oi' the degree of rigidity necessary to it as an operative member of the moldblock. So long as the cores are narrow the necessary rigidity of the cap-plate is not interfered with; but as their width increases the cap-plate is weakened, for in any case there must be holes through it large enough for the cores to work through.

The present invention, like the one just mentioned,has been conceived and developed with special reference to the machine described in the second patent above mentioned, and for that reason its application to that machine has been selected for illustration and detailed description. It does not require any core-holes in or through the cap-plate, but provides for the integrity of it being maintained by fastening the cores, as well as the distance-pieces, to the easting-face e'. e., the face that forms the respective side of the mold-cavity-of the cap-plates. The cores being then a fixture within the moldcavity, it becomes necessary to open the mold by moving the cap-plate away from the bottom one for a distance not less than the thickness of a linotype, in order that there may be room for the cores and the linotype to stand clear of each other when the ejector-blade advances. Preferably only the cap-plate is movable, not the bottom-plate as well or as an alternative, but only because for reasons outside this invention it is desirable that the bottom-plate be a iixture upon the mold- Wheel.

The newly-cast linotype is held to the bottom-plate when the mold is open by means of a double V-ridge standing across the face of that plate, the ejector-blade being slotted to clear it. The mold must be closed by moving the cap-plate toward the bottom-plate till the distauce-piecesare in metal-tight contact with the casting-face of the latter and locked in that position before the mold-wheel reaches the casting position. The type of closing and locking device is varied,` according as to whether it is outside the mold block or Whether it is between the latter and the axis of the mold-wheel.

The invention includes improved means for casting narrow linotypes such as are required for late news on printing-machines whose cylinders may not be cut away to make room for linotypes of full width. These linotypes are generally cored out either in their ends or in their feet. In either case the cores are made fast to the cap-plate, as already described. While the narrow linotype is held to the bottom-plate the sprue is held to the cap-plate by similar means, so that it is broken olf the linotype when the mold is opened. The ejector-blade isprovided with a lateral projection adapted to eject the said sp1-ue from the moldcavity without'pushing it beyond, so that it drops therefrom instead of being pushed forward into the trimming mechanism.

Referring to the accompanying figures, which are to be taken as part of this specitication and read therewith, Figure 1 is a front elevation showing the mold-block in the ejecting position and opened for the ejection of a full-width linotype having cored ends and also the same mold-block closed subsequently for the casting of the next one; Fig. 2, a side elevation corresponding with Fig. 1, but omitting the fingers that turn the starwheel; Fig. 3, a plan of the casting-face of the bottom plate; Fig. 4, a plan of the casting-face of the cap-plate; Fig. 5, a front elevation showing the mold-block in the ejecting position and opened for the ejection of a narrow linotype and its sprue and also the same mold-block closed subsequently for the casting of the next one; Fig. (j, a side elevation corresponding with Fig. 5 and in section for the distance represented by the line 6 of that iigure; Fig. 7, a horizontal section on the line 7 7 of Fig. 5, omitting the n1old-block; Fig. 8, a front elevation, on an enlarged scale, of as much of the opened mold-block illustrated in Fig. 5 as immediately surrounds the mold-cavity; Fig. 9, a rear elevation of the same mold-block; Fig. l0, a plan of the casting-face of the bottom-plate; Fig. 11, a plan of the casting-face of the cap-plate; Fig. 12`, a front elevation, and Fig. 13 a part side elevation, together illustrating the necessary modifications in the ejector-blade; and Fig. 14, a detail illustrating the necessary modification of the mold-wheel cam. Fig. 15 is a cross-section from front to rear of the mold shown in Figs. 8 and 11.

Ois the mold-wheel; 05, the gear with which its vdriving-pinion (not shown) engages; 017, the cap-plate; 018, the bottom-plate; 013 014, the two distance-pieces, the four last-men tioned parts constituting the mold-block; 0, the horizontal slot or mold-cavity in it; 036, the hole in the wheel O, into which the rearwardly-projecting portions of the mold-block project, and #51925 sockets to receive the stoppins for the mold-wheel when it slides forward, as heretofore.

According to the present invention the.

cores c5 cG and the distance-pieces 013 014 are made fast to the casting-face of the cap-plate 017, as shown in Figs. 1 and 4.

It should be noted with reference to the cores that neither the shape of them nor the position of them in the linotype has anything to do with the present invention. The only respect in which the latter affects them is their being fast on the cap-plate 017 instead of being passed through it.

The provision illustrated in Figs. 1 to 4 for the cap-plate 017, being movable away from the bottom-plate 018, consists of a piu 0129, fast to and projecting from each end of the bottom plate 018 in the direction of the cap-plate 011, holes 0130 through the latter to receive the said pins, and an expanding spiral spring0131, seated in a circular socket 013i in the castingface of the bottom-plate 015 about each piu 0129 and constantly pushing against the distance-pieces 018 011. The pins 0120 are long enough to allow of the cap-plate 017 being moved away from the bottom-plate 018 for a distance not less than the thickness of the linotype C, as shown in Fig. 1. The cap-plate 017 is prevented from being moved too far by the outer side of the hole 036, the rear portion, which stands in that hole, beingthinner than heretofore to allow of the above-described motion of the said cap-plate. As the latter is moved away from the botto1n-plate 018, it leaves the linotype C unsupported. At this time the mold stands in a vertical position, with the linotype on end. To prevent the linotype falling over toward the cap-plate, there is an undercut or dovetail 0136 extending transversely across the casting-face of the bottom-plate 018 for about three-quarters of the width of the latter, more or less, and which holds the linotype C in its normal vertical position close up to the plate 018 by reason of the linotype metal engaging behind the said ridge, as illustrated in Fig. 1, the linotype C being drawn in section to show that engagement. The ejector-blade O4 has a suitable longitudinal groove Oin it to clear the said ridge 0136, as illustrated in Figs. 12 and 13.

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The ridge 0136 may be replaced by undercut grooves O13, described farther on with reference to Figs. 5, S, 9, and l0.

The preferred device for unlocking the mold and closing and locking it again consists of a star-wheel 0133, pivoted by a stud 0134 on the face of the mold-wheel O, so as to turn in a plane parallel therewith, as indicated in Figs. 1, 2, 5, and 6. The stud 0131 stands at equal distances from the two ends of the cap-plate 017, and the length of the teeth of the star-wheel 0133 is such that if any one of them be set to stand in the direction of the mold-cavity 0 and-at right angles with it it will close the mold by moving the capplate 017 toward the bottom plate 013 until the distance-pieces 013 011 on the former are in metal-tight contact with the casting-face of the latter and lock it there. There is advantageously interposed between the top of the cap-plate 017 and the star-wheel 0133 a springbar 0133, made fast by its two ends to the said top, from which it stands clear for a short distance, as shown in Figs. l and 5, so that when the said tooth has pushed the cap-plate o17 up to the bottom-plate 013 in the way described the spring-bar 0135, being then in tension, eX- erts a spring-pressure upon the said cap-plate 017 in the direction of the bottom-plate 013.

The device by which the star-wheel 0133 is moved to unlock the cap-plate 017 and to close the mold and to lock the said plate 017 again after the linotype C has been ejected f rom the mold-cavity 0 consists of two lingers O57 O33, which are held to the frame of the niachine by any suitable means, so that they shall both stand in the plane of the teeth of the star-wheel 0133. Both fingers are shown as screwed to a piece O33, which is fixed to the mold-wheel slide 04, as shown in Figs. 6 and 7. The finger O33 projects nearer to the axis of the mold-wheel O than does the finger O31, for/a reason which is explained farther on. The arcual distance between them and their position with reference to the mold-block will be clearly understood from the following description of the way in which the invention constructed as described above works. When the mold-wheel O is in the casting position, the mold-block is in the position and condition illustrated by the dotted lines in Figs. l, 2, 5, and 7. At that time one of the teeth of the'star-wheel 0133-say the tooth C30-is holding the cap-plate 017 locked down with its distance-pieces 013 014 in metal-tight contactwith the bottom plate 013. After the linotype C has been cast the wheel O is turned in the direction of the arrows in Figs. l and 5 through an arc of two hundred and seventy degrees, so holding the mold-cavity with the linotype in it between the ejector-blade O4 and the trimming-knives. The said wheel is then ready to be moved forward into the ejecting position. Toward the end of that arc the tooth O31, being the one opposite to the then locking-tooth O3IO and projecting farther than any of the four from the axis of the moldwheel O, finds the finger O57 projecting into its path sufficiently far to turn it through an arc of forty-five degrees, which suffices to make the star-wheel 0133 assume the position illustrated by the full lines, thereby unlocking the cap-plate 017 and allowing the springs 0131 to open the mold, as. shown. So long as the cap-plate 017 is unlocked the teeth O30 O62 are in equal touch with the spring-bar 0133, thereby holding the star-wheel 0133 steady. The mold-wheel O is then moved forward into the ejecting position, and the linotype is ejected, as heretofore. The ejector-blade O4 is then retracted, and the mold-wheel O, after having been moved back, is moved through an are of ninety degrees in the same direction as before. The tooth O33 then finds the finger O33 projecting into its path farenough to turn the star-wheel 0133 to make the tooth O63 close the mold again in readiness for the next cast, as illustrated bythe dotted lines in Figs. l, 2, 5, and 7. Each of the four teeth of the star-wheel 0133 takes the several duties in turn. The radial distance of the tip of the tooth O31 from the axis of the wheel O before its contact with the finger O57 is greater than that of Athe tooth O33 before its contact with the nger O53. Hence the latter must be correspondingly longer than the nger O37.

Referring to Figs. 5, 6, and 7 there is illustrated therein a modification of the device for opening the mold. According to it the pins 0129 are replaced by pins O34. The capplate 017 fits over these in the same way as it does over the pins 0133. The pins O64 instead ofbeing fast to the bottom-plate 013, as are t-he pins 0133, pass through holes therein, in which they work with a working t, and extending beyond it for a distance equal to the opening movement of the cap-plate 017 are made fast in a rigid bridge-piece O33. O13 is a collar fast on each pin O34. To control the opening motion of the bridge-piece O33, a stop 075 is provided. Itis shown as consisting of the head of a screw turning in the mold-wheel O, notched for being turned therein and having a flat side O71, the radial distance of the latter from the axis of the screw being less than that of the arcual side O13, for a reason explained farther on. The said side O stands opposite the bridge-piece O65 when the mold is only to be opened for the ejection of a linotype. The function of the flat side O74 is described farther on. O66 is a recess in, and O37 is a decline on, the face of the bridgepiece O33, on theside of it next to the axis of the mold-wheel O, and O63 is a projection fast on the customary rod p3, being oneof the usual justication-rods. This rod is recipciprocated vertically by a cam, a bell-crank lever, and a spring. p13 (see Fig. 14) is the cam. It is rotated in the direction indicated bythe arrow. p11 is the lever, and p13 its fulcrum. The horizontal and longer arm of it is continued toward the front of the machine, where its front end is suitably connected to the rod p3, while its shorter arm terminates Ioo in an antifriction-roller p71, as illustrated in the above-mentioned specification of 1890. The spring above mentioned (omitted from the figure for want of space) is beneath the lever p11, bearing on it at a point between the fulcrum p10 and the front end of it. Being always in compression it is always ready to move the rod p3 upward. For the same reason it keeps the roller end p11 in contact with the periphery of the cam p15. The rod p3 is depressed by the rises on the cam, and it rises whenever a drop therein, such as the one p11, comes opposite the roller end p71.

The modification just described works as follows: Just before the mold -wheel O is moved forwardinto the ejecting position the cam 1913 presents the drop p11 to the roller p11, and the rod p3 is raised accordingly, thereby bringing the projection O68 rearwardly opposite to the recess in O33. The mold-wheel O is then moved forward into the ejecting p0- sition, and the cam-rise p73engages the roller p71, thereby depressing the rod p3, moving the projection OG8 downward over the decline OG1 to open the mold by pushing the bridgepiece O65 t0 the right and the collars OT3 against the cap-plate 017.

It will be observed that as the present invention places the mold-cavity for the linotype in the cap-plate 011 it will frequently be necessary to change the latter. To allow of this being done, the sockets 0132 are deep enough to allow ofthe collars O73 being drawn into them far enough for the pins O111 to be drawn out of the cap-plate 011, (see Figs. 8 and 9,) the radial distance of the at side OT4 of the stop being less than that of the arenal side O75 to allow of the bridge-piece 0111 being moved accordingly. When the stop is turned until its flat side OT4 is opposite to and parallel with the respective face of the bridgepiece O35, the latter can be moved from the bottom-plate 018 far enough to draw the pins 011 out of the holes 0130 in the cap-plate 011, so leaving the latter free to be removed.

The mechanism for making narrow linotypes and breaking off their sprues from them may or may not have combined with it cores for coring out those linotypes, as may be desired. It is illustrated in detail in Figs. 8, 9, 10, and l1, which showa core e311 for forming a double-V recess in the foot of the narrow linotype C23. Thelatter is held to the bottomplate 013 either by one or more ridges 0133, described with reference to Figs. l and 3, or by one or more double-V grooves O10. These latter will of course leave ridges upon therespective side of the linotype, but they will be removed by the trimming-knife. When the cap-plate 017 is moved up to the bottomplate 013, the core C31 is separated from the latter by a distance only just wide enough to pass metal from the linotype C26 into its moldcavity 0137. The metal flows into the latter between the ridges 031 031 on the ends of the core 010.

0133 is the mold-cavity for the sprue. Start- Gezin) ing from the rear edge of the edge of the core 020 the mold-cavity 0133 slopes rearward away from its opposite sidein the bottom-plate 018, as shown in Fig. ll.

O11 O11 are undercut ridges standing across the sloped face of the mold cavity 0133 and adapted after the manner described with reference to the ridge 0131 in Figs. 1 and 3 to hold the sprue to the cap-plate o17 when the latter is being moved away from the bottom-plate 013. The above-mentioned slope on one side of the cavity 0138 produces an elevation on the cap-plate 017 along the junction of the two cavities 0133 and 0137, which has the effect of making the connection between the linotype and the sprue so thin that they readily part by fracture along that junction when the capplate 017 is moved away from the bottom-plate 013. Fig. 5 shows the sprue parted or broken from its linotype and both still held to the respective plate 01s 011.

After both narrow linotype and its sprue have been cast the mold-wheel O is moved through its arc of two hundred and seventy degrees and the mold is opened by either of the devices already described, thereby breaking the linotype and the sprue away from each other along the junction of their respective mold-cavities. This parting by fracture is shown in Fig. 5. The ejector-blade O'1 is then advanced and ejects the linotype C26 from the mold-cavity 0131, pushing it through the trimming-knives into the galley. The sprue is ejected by the studs O72 O72, which project laterally from the respective side of the ejector-blade O1. They stand on the blade O4 far enough to the rear of the nose of it to prevent them touching the trimming-knives and eject the sprue to one side of them. The mold is then closed as the moldwheel moves through the ninety-degree arc into the casting position in the way already described.

It will be observed that in each form of mold herein shown the linotype is held by one member of the mold while the other member retreats, carrying with it the cores or projections which form the cavities in the linotype, and that thereafter the linotype is ejected edgewise from the mold in the ordinary manner, its retaining devices being formed to permit such movement.

We claiml. A linotype-mold, comprising two separable members, between which the linotype is cast, one having a core to form an opening through the linotype, and the other having surfaces substantial] y as described to interlock and hold the linotype during the withdrawal of the core, but allowing the subsequent ejection of the linotype as usual.

2. In a linotype-machine and in combination with mechanism for opening and closing the same after each casting operation, a mold, comprising two members between which the linotype is cast, one member having a core or cores to form openings in the linotype, and the other having transverse ribs to engage IOO and hold thelinotype during the withdrawal of the core, While permitting its subsequent ejection in an edgewise direction.

3. Thehereinbeforedescribedcombination in the casting mechanism of a linotype-machine, of a mold bottom-plate and a mold capplate capable of being separated for a distance notlessthan the thickness ofalinotype toopen the mold, one of them having a core or cores fast to the casting-face of it; a mold-cavity in one of the said plates for a narrow linotype; a mold-cavity for the sprue; and an elevation on the casting-face of one of them in the direction of that of the other plate along the junction of the respective moldcavities for the linotype and the sprue.

4. The hereinbefore-described combination in the casting mechanism of a linotype-machine, of a mold bottom-plate and a mold capplate capable of being separated for a distance notless than the thickness of a linotype to open the mold, one of them having a core or cores fast to the casting-face of it; a mold-cavity for a narrow linotype; a mold-cavity for a sprue; a device on or in the casting-face of each plate to hold the linotype and'sprue respectively thereto; and an elevation on the casting-face of one plate in the direction of that of the other plate along the junction of the respective mold-cavities for the linotype and the sprue.

5. The hereinbefore-described combination in the casting mechanism of a linotype-machine, of a mold bottom-plate and a mold capplate capable of being separated for a distance not less than the thickness of a linotype to open the mold, one of them having a core or cores fast to the casting-face of it; a moldcavity for a narrow linotype; a mold-cavity for a sprue; a device on orin the casting-face of each plate to hold the linotype and sprue respectively thereto; an elevation on the casting-face of one plate in the direction of that of the other plate along the junction of the respective mold-cavities for the linotype and the sprue; and mechanism for opening and closing the mold.

6. The hereinbefore-described combination in the casting mechanism of a linotype-machine, of a mold bottom-plate and a mold capplate capable of being separated for a distance not less than the thickness of a linotype to open the mold, one of them having a core or cores fast to the casting-face of it, a moldcavity for a narrow linotype; a mold-cavity for a sprue; a device on or in the casting-face of each plate to hold the linotype and sprue respectively thereto; an elevation on the casting-face of one plate in the direction of that of the other plate along the junction of the respective mold-cavities for the linotype and the sprue; mechanism for opening and closing the mold and mechanism for ejecting the linotype and the sprue.

7. The hereinbefore-described combination in the casting mechanism of a linotype-machine, of a mold bottom-plate; a mold capplate movable therefrom to open the mold;

core or cores held to the casting-face of the said cap-plate; a device for opening the mold; and a device Jfor unlocking, and for closing the mold.

8. The hereinbefore-described combination in the casting mechanism of a linotype-machine, of a mold bottom-plate; a mold capplate loosely held to the said bottom-plate so as to be movable therefrom to open the mold; a core or cores held to the casting-face of the said cap-plate; a device on the bottom-plate to hold the linotype up to it when the capplate is moved away from it; and an ejectorblade adapted to eject the said linotype from the mold.

9. The hereinbefore-described combination in the casting mechanism of a linotype-machine, of a mold bottom-plate; a mold capplate movable therefrom to open the mold; a core or cores held to the casting-face of the said cap-plate; springs interposed between the said plates to open the mold; pins fast to one of the said plates and engaging in holes in the other; astop to limit the opening motion of the cap-plateg and an automatic device for closing and locking the mold.

10. The hereinbefore-described combination in the casting mechanism of a linotype machine, of a mold-wheel; a mold bottomplate fast thereupon; a mold cap-plate loosely held to the said bottom-plate so as to be movable therefrom to open the mold; a core or cores held to the castingface.of the said cap-plate an automatic device for opening the mold; a star-wheel mounted upon the said mold-wheel near to the said mold cap-plate and capable by being turned more or less about its axis, of unlocking and of closing and locking the mold; and ingers fixed in respectively proper positions to engage the said star-wheel to turn it to unlock and to close and lock the mold.

11. The hereinbefore-described combination in the casting mechanism of a linotypemachine, of a mold consisting of two principal parts-a cap-plate and a bottom-plate movable from and to each other; a core or cores fast to, and a mold-cavity for a linotype in, the casting-face of one of them; a mold-cavity for a sprue; and devices on or in the cast-V ing-face of each plate to hold the linotype and sprue thereto respectively.

12. The hereinbefore-described combination in the casting mechanism of a linotypemachine, of a mold consisting of two principal parts-a cap-plate and a bottom-plate movL able from and to each other; a core or cores fast to, and a mold-cavity for a linotype in, the casting-face of one of them; a mold-cav'- ity for a sprue; devices on or in the castingface of each plate to hold the linotype and sprue thereto respectively; and an elevation on the casting-face of one plate in the direction of that of the other plate along the junc-A tion of the respective mold-cavities for the linotype andthe sprue.

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13. The hereinbefore-described combination in the casting mechanism of a linotypemachine, of a mold consisting of two principal parts-a cap-plate and a bottom-plate mov` able to and from each other; a core or cores fast to, and a mold-cavity for a linotype in, the casting-face of one of them; a mold-cavity for a spruc; devices on or in the castingfaces of each plate to hold the linotype and sprue thereto respectively; an elevation in the casting-face of one plate in the direction of that of the other plate along the junction ofthe respective mold-cavities for the linotype and the sprue; lnechauism for opening and closing the mold and mechanism for ejecting the linotype and sprue.

14. In alinotype-machiue, a mold comprising two parts, between which the linotype is cast, springs tending to separate said parts, and mechanism for automatically closing said parts together before each casting action and releasing them subsequent to such action.

15. In a linotype-machine, a mold consisting of two separable parts, substantially as described, in combination with an automatically-actuated device for closing said parts before and releasing them after each casting action, and an intermediate spring, through which the closing devices exert a yielding pressure.

16. In alinotype-machine, a turning mold- Wheel, a separable mold, having'one of its members attached rigidly to said wheel and the other movable in relation thereto, in combination with springs tending to open the mold, and an automatically-acting` mechanism to effect the closure of the mold previous to each casting operation.

1'7. In a linotype-machine, a rotary mold- Wheel, a mold mounted therein and consisting of two separable parts, a mold-closing device also carried by said wheel, and external stationary means to operate-said mold-closing device, substantially as described.

In testimony that we, CHARLES HoLLIWELL and WARWICK JAMES LEWIS, claim the foregoing as our joint invention We have signed our names hereto in the presence of the subscribing witnesses.

CHARLES HOLLIWELL. WARWICK J. LEWIS.

Witnesses to the signature of Charles Holliwell:

FRANCIS A. JACKSON, WILLIAM H. BURLING. I'Vitnesscs to the signature of Warwick James Lewis:

CHAS. S. WooDRoFFE, HARRY S. COX. 

